超长混凝土结构温度后浇带合理宽度的研究

Research on Rational Width of Post-Casting Temperature Band in Construction of Super-Long Reinforced Concrete Structures

摘要: 在超长混凝土结构施工中，结构配筋通常连续横穿预留温度后浇带，使其宽度变化受阻并导致设计效能减弱或消失，此时如增加后浇带宽度可对其受损效能进行补偿。针对横穿后浇带钢筋不截断情况，基于截面平衡与变形协调原理，提出了确定温度后浇带合理宽度范围的新方法，推导了技术分析过程，给出了计算例题，可供超长混凝土结构设计与施工参考。

Abstract: In construction of super-long concrete structures, the width change of reserved post-casting temperature band is limited generally by the steel bars across through the band, thus its design efficacy is weakened or disappeared. In this case, the lost efficacy can be compensated by increasing width of the post-casting band moderately. For the case of steel bars are not truncated or not overlapped at the band, based on the known principle of cross-section balance and coordination deformation, the new method to determine the rational width of post-casting band is proposed, then the analysis process and the calculation sample are shown as reference for structure design and construction.